Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 190 · 40 questions

How it works (Double and halve): Find the number ending in 5 and the even number. Double the one ending in 5; halve the even one. Repeat while it helps (25 → 50 → 100), then multiply.

1. 1.45 × 22 =
2. 2.20 × 35 =
3. 3.40 × 15 =
4. 4.55 × 16 =
5. 5.36 × 55 =
6. 6.45 × 10 =
7. 7.40 × 65 =
8. 8.25 × 8 =
9. 9.32 × 55 =
10. 10.55 × 6 =
11. 11.38 × 25 =
12. 12.75 × 18 =
13. 13.6 × 65 =
14. 14.15 × 20 =
15. 15.12 × 25 =
16. 16.65 × 34 =
17. 17.65 × 6 =
18. 18.14 × 25 =
19. 19.10 × 45 =
20. 20.125 × 28 =
21. 21.65 × 28 =
22. 22.65 × 22 =
23. 23.45 × 24 =
24. 24.65 × 30 =
25. 25.65 × 40 =
26. 26.10 × 35 =
27. 27.75 × 32 =
28. 28.15 × 30 =
29. 29.35 × 8 =
30. 30.25 × 22 =
31. 31.25 × 14 =
32. 32.55 × 16 =
33. 33.55 × 34 =
34. 34.55 × 26 =
35. 35.8 × 65 =
36. 36.125 × 18 =
37. 37.15 × 36 =
38. 38.55 × 20 =
39. 39.55 × 12 =
40. 40.22 × 35 =

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